Ironically, i've said before that they don't really need to do anything gameplay wise and thats where most of the work would be. Loads of people love is having different objectives and activities to complete. Even if you take it back a few years, they had cups to try and go for. Simple stuff like adding visual leagues, enhancements to logos, stadiums where you can add customisation. All of that won't change the gameplay, but its stuff you can work towards with friends. Hell, a penalty shootout mode for instance could be a good laugh too.
I do think they're trying to go that way because they are adding a 5v5 new mode which could be helpful, but for me still needs to be connected to Pro Clubs.